Effect van nestcontroles op het nestsucces van roofvogels

The effect of (the frequency of) nest visits during three stages of the breeding cycle was investigated in three tree nesting raptors, viz. Goshawk Accipiter gentilis, Sparrowhawk A nisus and Buzzard Buteo buteo. The number of nest visits varied, depending on species and stage of breeding cycle (prior to or during egg laying and up to and including egg stage and nestling stage). In none of the three species a negative impact of nest visits was found (table 1). Recommendations are given when not to visit an occupied nest, how to visit nests with young and how to handle nestlings.